Shahk-lastee



UNITED STATES D. G. CHASE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO GEO. PARR, OF BUFFALO, NEW YORK.

SHANK-LASTER.

Specification of Letters Patent No. 25,995, dated November 1, 1859.

T o all whom t may concern:

Be it known that I, D. G. CHASE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Shank-Laster; and I do hereby de- Clare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is an inverted plan of my invention. Fig. 2, is a side view of ditto. Fig. 3, is a side view of ditto, applied to its work.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to a new and improved shank laster, an implement or tool used by shoemakers for drawing leather over lasts.

The object of the invention is to enable the leather to be drawn over on the last and tacked thereto with greater facility than usual.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, A, -represent two cross bars connected by a pivot B, and allowed to work freely on said pivot. These bars are of metal and at one end of each a swivel nut a, is secured, one nut having a right and the other a left female screw to receive the right and left male screws o, c, on a shaft C, which has a handle D, at one end.

To the opposite end of each bar A, a swivel jaw E, is attached. These jaws E, are each formed of a metal plate of suitable length provided at its lower end with teeth cx, which are hooked or curved inward as shown clearly in Fig. l. The upper part of each plate is provided with a tang (Z, and these tangs pass through the bars A, and are riveted at their tops, the tangs being allowed to turn freely in the bars and forming swivels so as to allow the jaws to turn freely. The swivel nuts a, are attached to the opposite ends of the cross bars in a similar man ner.

It will be seen from the above description that by turning the shaft C, the jaws E, E, may be made to move simultaneously toward and from each other.

rThe jaws E, E, are made to grasp the edges of the leather at each side of the last, shown in red Fig. 3, which is retained on the lap of the operator as usual and by turning the shaft C, in the proper direction the edges of the leather also shown in red, are brought over the edges of the last at each side and the edges of the leather may be tacked to the last with the greatest facility. It will be understood that the device is moved along over the last intermittingly and the leather stretched and tacked until the whole is finished.

By means of this invention the leather will be drawn uniformly on or over the edges of the last as the jaws E, E, by their swivel attachment are allowed to conform to the curvature of the last. The shaft C, in consequence of having its screws b, c, fitted in swivel nuts is allowed to work perfectly free and easy without binding as the bars A, A, open and contract. The screw shaft C, also has such a relative position with the bars and jaws that no obstruction is presented to the driving of the tacks which secure the edges of the leather to the last.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is,

The jointed cross bars A, A, provided with the swivel jaws E, E, and swivel nuts a, cv, in connection with the right and left screw shaft C, the whole being arranged substantially as and for the purpose set forth.

I). Gr. CHASE.

IVitnesses:

LEwsoN E. CHASE, WILLIAM HYDE. 

